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Math Help - Probability function P(X=k)

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    Probability function P(X=k)

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  2. #2
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    Quote Originally Posted by totalnewbie View Post
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    Attempting to cut to the chase, what it looks like you're trying to do is find the mean and variance of a geometric distribution.

    E(X) = \sum_{k = 1}^{k = \infty} k p q^{k-1}.

    It's a routine calculation, found in many statistics textbooks. I can't be bothered typing out a solution .... That's why google exists.

    Edit: This thread has some relevance: http://www.mathhelpforum.com/math-he...ee-proofs.html
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